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Cognitive radio appears as a promising technology to allocate wireless spectrum between licensed and unlicensed users in an efficient way. The availability of spectrum holes vastly affects the throughput and delay of unlicensed users. Predictive methods for inferring the availability of spectrum holes can help to improve spectrum extraction rate and reduce collision rate. In this paper, a spectrum...
Aiming at the complexity of the simulation model for the agile layout of manufacturing system, an agile modeling and simulation technology is proposed based on Hierarchical Object-oriented Timed Colored Petri Net (HOTCPN) and eM-Plant software to convert workshop layout model into simulation model. HOTCPN and eM-Plant are both based on the hierarchical object-oriented method. Due to the structure...
Traditional collaborative filtering algorithm is a weighted average prediction algorithm based on nearest neighbors' ratings. Besides similarity between users, trust and credit are also parameters to affect recommendation. This paper proposes a computational model of credit factor and then a collaborative filtering algorithm based on it. This model is based on trust factor and takes credit model as...
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